I don't know about you but my Keurig is long overdue a deep clean. I did the initial deep clean suggested the first time I used it. I did the "run a few cycles of hot water through it" clean a month or so later.
Chances are pretty high that my Keurig is full of mold and mildew. So I sought out a guide to a deep clean and found this one.
The good news is that you won't need too many supplies as you get prepared:
Dish soap, a cleaning brush or a toothbrush, a butter knife, paper towels, distilled white vinegar and purified water
Also, I have started looking for recyclable K-Cups when I don't use my mini K-Cup filter and regular coffee. Publix brand K-Cups feature a removable coffee pack that allows you to recycle the cup.